1, "Hutong": Hutong whose width is only walkable; A small street that can only accommodate one car. From Mongolian gudum. People in the Yuan Dynasty called the streets and lanes hutongs, and later they were the general names of the streets and lanes in the north. It can be seen that the word "Hutong" has only been used in Chinese since the Yuan Dynasty, and its scope of use is limited to Beijing (that is, the capital of the Yuan Dynasty at that time-called "Zhongdu" or "Dadu"-that is, Yanjing in the past and Beijing now).
2. "Alley": what people usually call "small street" or "narrow lane".
The literal meaning of "dead end" refers to an alley with only one entrance and exit, and it is also a metaphor of despair and dead end. The metaphorical meaning is fixed and generally cannot be changed, so a "dead end" cannot be called a "dead alley". Just as I can't call "penniless" penniless.